One way to go about this would be to set Limit to list = False and do your
own check.
For example, after the user enters info into the combo box, use code in
either the LostFocus or the AfterUpdate event to check the information in the
combo box against the set of values allowed; this should be easy if your
rowsource for the combo box is a table.
If the string value in the combo box is not allowed, then use a MsgBox to
give them a customized error message, and you can automatically clear the
combo box (or not).
HTH,
Nick
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